CN104113846B - Method and apparatus for dispatching quiet period - Google Patents
Method and apparatus for dispatching quiet period Download PDFInfo
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- CN104113846B CN104113846B CN201410269623.9A CN201410269623A CN104113846B CN 104113846 B CN104113846 B CN 104113846B CN 201410269623 A CN201410269623 A CN 201410269623A CN 104113846 B CN104113846 B CN 104113846B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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Abstract
In distributed AC servo system cognitive radio networks, each Secondary Users in network（200）Instruction equipment is broadcasted reliably to detect main users（290）And the parameter that the minimum quiet period sensing of the regular quiet period needed is required（125）.Each equipment in the network（200）Its quiet period sensing rate is adjusted, is required with adapting to the minimum sensing of highest（155,160）, the optimum efficiency supported relative to quiet period is thus provided, while ensuring all devices in the network（200）Its minimum quiet period sensing is provided to require（150）.Held consultation between interval between regular quiet period and the equipment both the duration of these quiet periods on that network（155）.Quiet period is indexed（140）For all equipment to be synchronized into common time base.Also provide for the effective coordination technology that quiet period is asked on demand, and for supporting to be used for the technology for the different silent period schedules that multiple main users are classified.
Description
Technical field
Dispatched the present invention relates to the field of cognition wireless telecommunication, and more particularly, between distributed user
（Arrange）Quiet period（quiet-period）To promote the method and system of channel monitoring.
Background technology
Cognitive radio is such a communication plan, and in the communication plan, equipment monitor is licensed-in
（licensed）The activity of channel, and communication is only set up on inactive channel.This is used to the offer of local communication network
The especially feasible solution of untapped communication bandwidth, such as allows local（Family）Network（home network）Operation
On untapped television broadcasting channel.Such local network is generally used for direct or advance volume usually according to user
Instruction, the equipment in permission family and the appliances of journey are in communication with each other and reciprocation.The scope of such communication can be
The instruction of user's preheating baking box is until the exchange of the audio/visual information between the equipment such as camera, video recorder, display.
For the purpose of this disclosure, the authorized user of the channel of such as Television Broadcasting Limited and/or the use being licensed
Family is referred to as the main users of the channel, and the user of the channel without being used by main users is then referred to as secondary use
Family.
The indispensable element that unused channel is successfully shared by Secondary Users is to determine that channel is practically without by main users
The ability used.Quiet period（QP）It is defined as such time, all Secondary Users avoid during the time
Sent on channel；Such quiet period can be regularly scheduled, or (on-demand) is scheduled on demand.Generally, it is fixed
The quiet period of phase scheduling allows quick sensing, because equipment only needs to enable its sensor device in scheduled time；
However, the duration of quiet period may be too short for some equipment, or if the duration for most of equipment
If being oversize, then it may cause poor efficiency.On the other hand, sense on demand（on-demand sensing）Need to set in request
The standby coordination between every other equipment, but this allows equipment that the duration of requested quiet period is set to for this
It is optimal length for particular device.
It is fairly easy that regular schedule and scheduling on demand are implemented on the network operated by centerized fusion, but
It is that it implements to be significantly much more difficult on the network with distributed AC servo system.In the network for crossing over many hop distances, this
Plant difficulty to be typically further exacerbated, because simultaneously the equipment of not all will all carry out direct communication each other.
The content of the invention
The dispatching party for allowing quiet period regularly and to be on demand effectively scheduled in distributed control network is provided
Case will be favourable.The scheduling scheme for allowing quiet period regularly and to be on demand effectively scheduled in multihop network is provided
Also will be favourable.
These advantages and other advantages can be realized by a kind of method and system, wherein in distributed AC servo system
In cognitive radio networks, each Secondary Users' broadcast parameter in network, the parameter indicates the equipment in order to reliable
The detection of main users and need for regular quiet period minimum quiet period sense require.Each equipment in network is adjusted
Whole its quiet period sensing（Speed）Rate, is required with adapting to the minimum sensing of highest, thus provides related to quiet period support optimal
Efficiency, ensures simultaneously：All devices at least in the network provide its minimum quiet period sensing and required.In regular quiet period
Between interval and these quiet periods duration equipment on that network between hold consultation.Quiet period index by with
In all equipment is synchronized into common time base.
Brief description of the drawings
Further specifically and using example, the present invention is explained with reference to the accompanying drawings, wherein：
Fig. 1 shows to ensure to assemble between each node of the multihop network with distributed AC servo system（Convergence）And it is synchronized to public affairs
The example flow diagram of the quiet period processing of the silent period parameters of coset.
Fig. 2 shows the example block diagram of the node with quiet period processor according to the present invention.
In the drawings, identical reference numeral refers to identical part or performs the portion of substantially the same function
Part.It is that for illustrative purposes, and these accompanying drawings are not intended to limit the scope of the present invention including these accompanying drawings.
Embodiment
In the following description, following detailed description, the specific details of elaboration, such as specific framework,
Interface, technology etc., to provide the comprehensive understanding of the present invention.But, to those skilled in the art, the present invention can also
Implemented in the other embodiment away from these specific details, this is obvious.For purposes of brevity, it is well-known
The detailed description of equipment, circuit and method will be omitted, in case description of the invention is obscured by unnecessary details.
As described above, the present invention is directed between various possible channels dynamically repositionable equipment and net
Network.In an exemplary embodiment, possible channel is the master for being commonly accorded or being granted to such as Television Broadcasting Limited etc
The channel of user is wanted, but the actual occupancy of each channel is different.For example, due to the possibility of interference, therefore television channel
The distribution of broadcaster into given area is restricted to every a channel, causes the half channel in usable spectrum to be
It is empty.In other environment, main users are changed over time to the occupancy of channel.Dynamically relocatable network can
By the way that its own foundation is utilized into the poorly efficient frequency spectrum used on untapped channel.For ease of understanding, using being defined
Channel and Secondary Users' network to the one-to-one corresponding between the use of channel（Relation）To introduce the present invention.However, this area
It will be recognized that in the case where not departing from the intent and scope of the present invention, can support many in a channel
Individual network, or a plurality of channel can be needed to support a network.
With technological progress, the quantity of the equipment with communication capacity, which can be expected, to be exponentially increased, and correspondingly,
By being configured to being licensed/controlled channel on serve as Secondary Users the quantity of equipment will also increase.Although these are secondary
Each in user equipment will be configured to avoid to send on the channel taken by main users, but some equipment may
" the edge of broadcast in main users（fringe）" in region, or receive in bad indoor room in external broadcasting,
And it may not recognize the presence of main users.Therefore, this Secondary Users can send on this channel, and this
Transmission may flood（Overwhelm）In other auxiliary equipments near this Secondary Users for main users presence identification.
Because each in these other auxiliary equipments is sent on this channel, therefore for main use in other auxiliary equipments
The identification of the presence at family will adversely be affected.Therefore, in order to ensure that main users will be identified, it is necessary to have all is auxiliary
It is all quiet some times on channel to help equipment, to avoid this cascade disturbing effect.
Contemplating all nodes allowed in network, the specific time is upper, setting for all current actives all with being intended to
The duration of the presence of main users is all securely enough to recognized for standby, is silent（It is inactive）Task.In
In the network for entreating management, all devices that central controller can be guided periodically on network are for being enough to allow some or most
It is quiet for the duration that number equipment detects main users, and in the presence of any device report main users
When, order changes channel.In the special of such as local network etc（ad-hoc）（Self-organizing）In network, it is impossible to it is assumed that there will be
Equipment with network control capabilities, can not assume there may be with conflict control agenda multiple has setting for control ability
It is standby.Therefore, procotol has been developed to allow the operation of the network without central controller.In the feelings without central controller
Under condition, the agreement for Secondary Users' network must include the quiet period ginseng for being used to cause each equipment to agree to common set
Several means, and lacking the control device of regulation silent period parameters and be available for relying on without any specific equipment providing
In the case of common time base, the means for being synchronized to common time base are operated for each equipment.
Regular quiet period is defined as the quiet period with the specified duration periodically occurred.For the ease of reference,
The periodicity of regular quiet period is defined according to the interval between regular quiet period in this paper.In the agreement based on superframe, lift
For example, interval can be defined as the quantity of the superframe between quiet period.For example, size corresponds to for 5 quiet period interval
The quiet period occurred on each 5th superframe；That is, the quiet period interval is the inverse of quiet period frequency
（inverse）.It is assumed here that：, can be predefined regular for all equipment in the case where not influenceing the gross efficiency of network
The more detailed parameter of quiet period, such as quiet period occur from the beginning of superframe or end, also occurred from the superframe
Special time on.
Although required interval and the standard of duration of predefined quiet period can be set up, recognize, different sets
The standby detection for main users is by with different abilities.Some equipment can include being custom-designed to detect main users
The complex filter of the distinctive feature of broadcast, such as detects the specific carriers present in conventional television broadcasting or synchronous letter
Number wave filter.Other equipment can be only included in will in the case that the energy accumulated on the period specified exceedes specific threshold
Channel is categorized as the energy detector taken by main users.In view of this changeability between equipment, this class standard will need
" least common denominator " of sensing function is adapted to, and would be possible to excessively poorly efficient and can not adapt to high quality-of-service（QoS）Need
The network asked.
As replacement, a kind of interval of predefined quiet period can be set up or the duration but do not predefined both
Standard.By means of such standard, the member of particular network would only need to consult the parameter not being predefined and its synchronous behaviour
Make, to avoid the transmission during the quiet period reached an agreement.I.e., it is assumed that：Needed in order to sense the reliable detection in circulation
In terms of the sum/total amount for the sensing sampling wanted, each equipment has a minimum sensing " requirement ", and this sum sampled can be
Multiple short durations during the quiet period of a small amount of long duration or in each sensing circulation in each sensing circulation
Quiet period during accumulated.In this way, it is assumed that the fixed parameter of definition（Interval, duration）It is any to cause
Equipment can be by appropriately selecting adjustable parameter（Duration, interval）To realize that its sensing is required, then each network exists
Only it will be limited in performance by its lowest capability member, and in the network with high quality-of-service demand, membership qualification
The equipment of the sensing function with the lowest class will be limited to.
Preferably, in order to provide further flexibility and improved network efficiency, can set up allows setting on network
The standby interval for adjusting regular quiet period and the standard of duration.As described above, predefined interval or duration must make
Obtaining any auxiliary equipment can realize that its sensing is required by adjusting another parameter.But, this predefined ginseng
Number is probably excessive for high-performance equipment, reduces the accessible performance of network of such high-performance equipment.
In a preferred embodiment, the silent period parameters of common set are held consultation between the Secondary Users of network, with fixed
The interval of adopted quiet period and duration, and common time base is set up among these devices.Preferably, each equipment is transmitted
The silent period parameters of its current collection, and define allow each equipment easily according to from other equipment receive parameter come
The algorithm of its parameter is adapted to, to cause all equipment promptly to converge at（Concentrate on）The silent period parameters of common set.It is aobvious
So, if interval and/or the duration be predefined, its value without consult, and these equipment be not suitable for it is different
Value.If the interval relative to the common receiving of common time base and duration given quiet period, then each equipment energy
Enough avoid sending during each among these quiet periods periodically occurred, thus avoid above-mentioned cascade disturbing effect.
Fig. 1 shows to ensure that meeting coalescence is synchronized to the silence of common set between the node of the network with distributed AC servo system
The example flow diagram of the processing of period parameters.Both interval at the beginning for quiet period and duration be it is negotiable more typically
Situation introduce this method, and the special case of pre-defined any of which one is then individually described.
110, the equipment ability of the presence of main users on channel is initially reliably detected according to it selecting or
It is determined that it is preferred that quiet period interval or the duration.In order to realize maximum network efficiency, these parameters are selected to closing
Largest interval and minimum duration on the confidence level of reason required for reliable detection.Quiet period interval is preferably relative to determining
The basis of justice（underlying）The cycle of message transmission protocol is defined.In timeslot-based agreement, the interval can be with
It is defined as the time slot of given quantity；In the agreement based on superframe, wherein superframe includes multiple time slots and other signalings to have
Help the definition and control of the multiple time slot, the interval can be defined as the superframe of specified quantity.In the same way, it is quiet
Silent duration phase is defined preferably relative to the time measure of identification, the duration of such as time slot.
In a preferred embodiment, in order to help quickly to converge to the parameter value that agreement is gathered, it is spaced and in the duration
Each be to be selected from the value of finite aggregate.Largest interval will generally be defined as ensuring：Network is regularly monitored
The arrival of new main users.Minimum interval and/or maximum duration will generally be defined as avoiding too frequent and/or mistake
The poor efficiency of long sense period.Optionally, the set of the interval recommended/duration pairing, which may be defined as realizing, to be given
Sensing requirement, further to promote quick assemble.Similarly, the selection at interval and duration value can be limited to finite aggregate
The paired value of conjunction, without each single item for allowing to be selected independently in interval and duration value.
115, quiet period index is initialised.Quiet period index is the index that common time base is synchronized to for promotion,
Converge to public index corresponding with converging to common time base.In the simplest embodiment, quiet period index is with for defining
The unit at quiet period interval（Unit）Appearance each time and be incremented by.In other words, for example, if quiet period interval foundation
The quantity of superframe is defined, then quiet period index is incremented by with each superframe.Conceptually, quiet period index correspondence
In " phase of the superframe in quiet period interval（phase）”.Note, initially, with each equipment, independently to start its quiet
Silent phase index, these equipment will be " out-phase（out of phase）”.Current super frame can be considered as " first " and surpass by one equipment
Frame, and another equipment can be regarded as " the 9th " superframe, and another equipment may then be regarded as " the 20th " superframe,
It is such.Thus, even if each equipment among these equipment is reached an agreement with regard to the public interval of superframe between quiet period
Opinion, each equipment also will observe the quiet period on different superframes.In order to which all equipment is on identical superframe
Quiet period is observed, all equipment must be either in phase with one another for the quiet period.
It is assumed that each equipment is similarly configured to be selected independently or initializes quiet period index, interval and continue
Time, then Fig. 1 method is provided help to adjust on some of these equipment or all devices it is some or all of these
Parameter, rapidly to converge to all devices on support network on each device and to optimize also relative to quiet period
The silent period parameters of the common set of network efficiency.
In the exemplary embodiment, using basic superframe or similar message transmission protocol, wherein each superframe is included initially
Cycle, within the initial period, device broadcasts " beacon ", it, which is included, contributes to the management and control of subsequent messaging cycle
Information.For example, the beacon, which can be included in subsequent superframe, sends the request of message, to being set in preceding superframe from another
Confirmation of request of standby middle transmission etc..In a preferred embodiment, equipment beacon is further configured to broadcast the current quiet of the equipment
Silent period parameters.However, it would be recognized by those skilled in the art that the principle and scope of the present invention are not limited to use superframe structure
Network.In alternative embodiment, for example, silent period parameters can be set as the content of explicit message from this
It is standby to be sent to some of network or every other equipment.
Circulation（loop）120-190 corresponds to each circulation of basic message transportation protocol；In this illustration, correspondence
Each superframe in above-mentioned example agreement.120, counted using the mould corresponding with index range（modulo
count）, it is incremented by quiet period index.Because phase is measured between this index corresponds to the equipment occurred relative to quiet period,
Therefore its number range need to only extend on the interval corresponding with the quiet period interval of most long definition.Generally, 16 bit words will
It is enough to act as the index.Other phase indexing technique can also be used.In alternative embodiment, for example,
The index is initialized to quiet period interval, is decremented by with each circulation, and be reset when the index reaches zero
To quiet period interval.
In 125, the device broadcasts its current quiet period index, interval and duration.（If interval or duration
One of parameter is predefined between all devices, then does not broadcast its value）.In this equipment scope each other
Equipment will receive the parameter of this equipment.Correspondingly, 130, this equipment will receive current in other equipment in its vicinity
The broadcast of silent period parameters.
The equipment evaluates the silent period parameters from other equipment via circulation 135-165, to determine whether it needs
Its parameter is adjusted to adapt to the sensing demand of any other equipment.
140, if highest index is more than the current index of the equipment, the current index of the equipment is updated to be equal to
The highest index received.Highest is currently indexed between by the way that the index of each equipment is arranged into communication equipment, finally
All devices in the network will have identical index, and thus be either in phase with one another.Can also use with it is this relative to
The consistent selection scheme of technology of the phase of each synchronous equipment is carried out at quiet period interval.For example, the index of the equipment can
It is configured to other statistics of the index set of minimum current index or sign communication equipment, it is assumed that in each communication
In equipment scheme and identical synchronization rules are indexed using identical mark.
150, the sensing requirement that current silent period parameters and each of the equipment are received is compared.Sensing is required
It may be defined as quiet period duration divided by quiet period interval.For ease of reference, according to the current quiet period in equipment
Sensing " rate " in parameter, term equipment is used to indicate that satiable requirement.Initially, the sensing rate of equipment will equal to it
Ask, but as its interval and/or duration parameters are adjusted to accommodate in the requirement of relatively low sensing function equipment, the equipment
Sensing rate by more than the primitive request of the equipment.
If the duration defines according to the quantity of time slot, and is spaced according to the quantity of superframe between quiet period to determine
Justice, then sensing rate corresponds to the average of the sensing time slot of each superframe.The quantity of the higher sensing time slot of each superframe
Corresponding to the requirement of higher sensing sampling, or equivalently, indicate the equipment with lower capability.Because quiet period should be adapted to
All devices on network, therefore 155, the equipment is configured to interval and duration parameters by using other equipment
Agree to this high requirement to meet high requirement.It is current not quiet to it if the presently sensed rate of this equipment is higher
It is changed during silent every with duration parameters.
The combination at different intervals and duration can result in identical sensing rate.If current when being spaced, continuing
Between interval of the pairing different from other equipment, duration pairing, and each pairing still provides identical sensing rate, 150,
The additional match after victory or defeat can not be divided using any number of race（tie-breaking）（Clinch a tie）Rule.One example
Rule can be：Relative to longer quiet period duration, frequent sensing（Lower interval）Be it is preferred, or vice versa
It is as the same.Or, as set forth above, it is possible to provide the interval recommended, duration pairing for each sensing rate.
Note, algorithm above is assumed：Any interval of identical sensing rate and the combination of duration are provided each
It is equally suitable in individual equipment.If situation is really not so, and equipment can not use other equipment to provide specified sense
Survey rate and the interval that selects and duration realize reliable main users detection, then the equipment can keep it current
Interval and the value of duration, or selection provide acceptable interval-duration pairing of slightly higher sensing rate, so that its
His equipment can use these parameters, if acceptable.In alternative embodiment, if equipment can be used
The interval of any set, duration parameters, then the equipment is configured in draw（Deadlock）During appearance randomly or hand over
Alternately each is selected to gather.Repeated to state by another equipment in such manner, it is possible to select the equipment of any pairing to gather
Pairing.In order to avoid setting for each every other interval-duration pairing for providing identical sensing rate can not be received
Locking between standby, in the " restrained of given quantity（tied）, but be not identical pairing " circulation after, what is currently selected sets
Standby " will be forced " goes interval of the selection with higher sensing rate-duration pairing.As described above, one group of preferred interval-
Duration pairing can be defined as the scope across feasible sensing rate, and in order to help to assemble, it is impossible to agree to specific
The equipment of interval-duration pairing can be limited to only be selected from this set.
By the way that initially the quiet period interval of each equipment and duration are arranged in order on each device
Minimum sensing requirement required for reliable detection main users, and by then agreeing to change the quiet period in each equipment
It is spaced with duration parameters to adapt to the sensing requirement of highest needs, is meeting the same of the sensing requirement of this highest needs
When, the operation of network converges to optimum efficiency by providing minimum sensing rate between all devices on that network.
Note, for being wherein spaced or during system that one of duration parameters are predefined, this identical is fitted
The principle for answering the minimum sensing of highest to require can be used in optimizing the efficiency of the network.However, because one of parameter is fixed, institute
Having to explicitly it need not be determined and test with sensing rate.On the contrary, because sensing rate is directly proportional to the quiet period duration, and
It is inversely proportional with quiet period interval, so 160, selecting higher duration or relatively low interval to cause to select higher sense
Survey and require.
After according to broadcast adjustment quiet period index and sensing rate from other equipment, the equipment enters conventional disappear
Cease transfer phase.This stage can include the observation of the quiet period to occurring without transmission.
In 165, the index in current transmission cycle（For example, the index of superframe）It is assessed, to determine whether to transmit for this
Cycle arranges quiet period.As noted, quiet period interval corresponds to the quantity of superframe between quiet period, and thus on the interval
The modulus of index will be zero on each quiet period interval.If the modulus currently indexed is zero, then the transmitting of the equipment
Machine is configured to observe quiet period during the part in the transmission cycle corresponding with the quiet period duration of agreement.
190, according to as defined in basic message transportation protocol, message is sent and received, except during quiet period
Outside, if quiet period is activated.This loops back to 120, is updated and message transfer process with repeating quiet period.Such as
This, if new equipment adds the network, or sensing requires to reach from the remote equipment on network, and the equipment will be by suitably
It is configured to observe the regular quiet period.Note, while silent period parameters of all equipment positive convergences to agreement set, certain
A little equipment may not be synchronized to appropriate silent period schedule, but this asynchronous situation is by self-elimination, because net
Each equipment on network converges to synchronous and minimum sensing rate, as defined above.
Although above-mentioned processing ensures to meet the minimum sensing requirement of each equipment on network, equipment there may be
Expect the situation of additional sensing time.For example, equipment may be configured to determine main use when measuring and being higher by first threshold
Family is present, and determines that main users are not present when measuring less than Second Threshold, but if this is measured between first and second threshold
Then it is uncertain between value.In this case, the equipment can use the additional sensing time to solve this problem.
Conventional based on predetermined（Retain）System in, wherein once request, i.e., to set during the message transmission stage
Back-up matches somebody with somebody one or more transmission time slots, and each equipment is only sent during one or more time slots of its distribution.Therefore, it is
Enable quiet period on demand, equipment only needs to ask transmission time slot for the required duration on demand, and then avoids
Sent during its transmission time slot distributed.
In some agreements, the distribution for each equipment is restricted, to ensure that any one equipment will not be defeated
（Overwhelm）Network.In another embodiment of the present invention, equipment is allowed to require another equipment in another equipment quilt
Abandoned during the time slot of distribution（forego）Send.For example, such scheme is possible to be used for by the main equipment in MS master-slave relation
Protect quiet period, the distribution without sacrificing its transmission time slot.
Although above it is predetermined-- without using（reserve-but-don't-use）Technology allows any equipment to be pressed
Quiet period is needed, but the use of this technology can result in substantive poor efficiency, because in numerous equipment on network
Each equipment either directly or indirectly protects quiet period, to be used alone.
According to an aspect of the present invention, it is intended that obtain quiet period on demand by not sent during its time slot distributed
Equipment by informing intention that the equipment do not send to other equipment other equipment can be allowed to use this quiet period.With
Such mode, due to multiple users " shared " identical quiet period, therefore individually, the quantity of quiet period can significantly add
To reduce.The notice that quiet period for other users is created will depend on specific agreement；In the system based on beacon, this
Individual notice is preferably contained in beacon, and the equipment confirms the distribution of its time slot in the beacon.
In order to further simplify this on-demand request and notifier processes, it can be modified to remove based on predetermined agreement
Also supported specifically " quiet period request " outside conventional " transmission cycle request ".It is silent with transmission cycle request
The effect of phase request will be the distribution of the time slot based on request, but the specific quiet period request of offer account for some effects.It is first
First, because the request is clearly used as quiet period, the broadcast of the request is used to notify to other equipment：Ask equipment
It will not send, and need not individually notify during the time slot of distribution.In addition, conventional is generally wrapped based on predetermined agreement
Overhead processing is included, to ensure：Predetermined receiver can be used for receiving message before distribution time slot.Due to quiet period request in itself
Without predetermined receiver, so this expense can be avoided by.Equally, in transmission time slot of the limitation for each equipment
Distribution agreement in, the request for quiet period time slot may not be counted in the distribution limitation of equipment, or may be to subtract
Low speed is calculated.
Fig. 2 is shown in main users（P）Worked in 290 environment, the relocatable assisting user equipment of dynamic（S）
200 example system.As discussed above, main users 290 be typically frequency spectrum in available channel be authorized to and/or be licensed
User, and auxiliary equipment 200 is configured to avoid interference while also using the channel in the frequency spectrum these mainly used
Family 290.
Figure 2 illustrates the example block diagram of one of auxiliary equipment 200.Example apparatus 200 includes quiet period processor
220, the processor receives the silent period parameters from other equipment 200 via receiver 230, and adjusts its operation to meet this
There are the silent period parameters of the equipment of peak demand in network for the sensing time.Auxiliary equipment 200 includes being used to send and connect
Receive the message handling device 210 of message and for being limited to the quiet period of agreement according to sending message and other signals such as
The emitter 240 of above-mentioned beacon signal.
Preferably, quiet period processor 220 is configured to control regular quiet period processing, monitoring, and control with above
Fig. 1 of detailed description example flow and quiet period control technology is consistent on demand as also described above.Certainly, note：Quiet period
Processor 220 is configured to be avoided sending during any regular quiet period according to the silent period parameters of one group of agreement, and
And be further configured to：Once it is configured to avoid passing during the time slot of distribution using the agreement for providing predetermined time period
It is defeated, then notify other equipment.
The principle of the present invention is illustrate only above.Thus, it will be appreciated that those skilled in the art are possible to design reality
The various schemes applied the principle of the present invention and thus fallen within the spirit and scope of the invention, although herein without clearly
Describe or show these schemes.For example, regularly silent period schedule as detailed above is to set up the silence of signal period
Phase and be introduced, but the principle proposed herein can be readily applied to set up multiple silent period schedules.For example, not
With schedule can according to the schedule of main users the different time in one day or the different dates in one week
Applied.Similarly, different types of main users can have different types of transmission characteristic.In general, if ring
Border includes the main users of multiple classification, and can use with different scanning demands should be in each classification, then can provide not
Same dispatches to adapt to the main users of each classification.Preferably, for example, for each classification, use Fig. 1 stream
The processing 110-165 of journey figure, will be established independently interval-duration pairing for each classification.Resulting interval-continue
Time pairing set is subsequently processed, to provide the overlapping quiet period duration in feasible situation.For example, such as
Really a member/classification in the set has the interval of four superframes, and there is size to be eight for another member/classification
Interval, then the quiet period of each 8th superframe is only required to be the duration of a cycle, it is held for two longer with size
The continuous time is equal.To those skilled in the art, according to the disclosure, the system configuration of these and other and optimization
What feature will be apparent, and be comprised in the category of following claims.
When explaining these claims, it is clear that：
a）Word " comprising " is not precluded from the miscellaneous part outside part listed in a given claim or action
Or the presence of action；
b）Word "a" or "an" before part is not precluded from the presence of this multiple base part；
c）Any reference symbol in claim is not intended to limit its scope；
d）Several " devices " can be represented using the structure or function of identical or hardware or software implementation；
e）Each disclosed part can be by hardware components（E.g., including discrete and integrated electronic circuit）、
Software section（For example, computer program）And any combinations of software and hardware are constituted；
f）Hardware components can be made up of one or both of analog- and digital- part；
g）Unless expressly stated otherwise, otherwise any disclosed equipment or part thereof can be combined together, or be separated into
More parts；
h）Unless specifically indicated, otherwise it is not intended to require specific sequence of movement；And
i）Term " multiple " part includes two or more required parts, and does not imply that any specific quantity model
The part enclosed；That is, multiple parts can be the part of few to two.
Claims (11)
1. a kind of method for dispatching quiet period, including：
The corresponding quiet period interval of the quantity of transmission unit between periodic quiet period in equipment is defined,
The broadcast index corresponding relative to the phase at the quiet period interval with current transmission unit,
Other indexes are received from miscellaneous equipment,
According to the equipment and the shared synchronization rules of the other equipment, the index in the equipment is optionally provided into
Equal to other described indexes, and
According to the index, transmission is avoided during quiet period.
2. the method for claim 1, including：
The quiet period interval is broadcasted, the quiet period interval corresponds to the parameter of sensing rate,
Other quiet period intervals are received from other equipment, other described quiet period intervals correspond to the parameter that sensing is required, and
If it is described sensing require exceed the sensing rate, by the quiet period interval be optionally provided into equal to it is described its
His quiet period interval.
3. the method for claim 2, including：
Broadcast the quiet period duration, the quiet period duration corresponds to another parameter of the sensing rate,
Other quiet periods duration is received from other equipment, other described quiet period duration correspond to the sensing and required
Another parameter, and
If the sensing requires to exceed the sensing rate, the quiet period duration is optionally provided into equal to institute
State other quiet periods duration.
4. the method for claim 1, including：
Broadcast the quiet period duration, the quiet period duration corresponds to the parameter of sensing rate,
Other quiet periods duration is received from other equipment, other described quiet period duration correspond to the ginseng that sensing is required
Number, and
If the sensing requires to exceed the sensing rate, the quiet period duration is optionally provided into equal to institute
State other quiet periods duration.
5. the method for claim 1 wherein the index is incremented by as each transmission unit occurs, and the quiet period
Modulus depending on the index relative to the quiet period interval.
6. the method for claim 1 wherein it is described index with each transmission unit occur and be decremented by, and it is described index week
Phase property it is reset equal to the quiet period interval.
7. the method for claim 1 wherein the synchronization rules include by it is described index be set equal to it is following at least one
：
Minimum index among the index and other described indexes, and
Maximum index among the index and other described indexes.
8. a kind of equipment for dispatching quiet period（200）, including：
Receiver（230）,
Emitter（240）,
Processor（220）, it is configured to：
The quiet period interval that the quantity of transmission unit is corresponding between definition and periodic quiet period,
Via the emitter（240）, broadcast corresponding relative to the phase at the quiet period interval with current transmission unit
Index,
Via the receiver（230）, other indexes are received from other equipment,
According to the equipment and the shared synchronization rules of the other equipment, the index is optionally provided into equal to described
Other indexes, and
Based on the index, the emitter is controlled, to avoid transmission during quiet period.
9. the equipment of claim 8, wherein the processor（220）It is configured to：
The quiet period interval is broadcasted, the quiet period interval corresponds to the parameter of sensing rate,
Other quiet period intervals are received from other equipment, other described quiet period intervals correspond to the parameter that sensing is required, and
If it is described sensing require exceed the sensing rate, by the quiet period interval be optionally provided into equal to it is described its
His quiet period interval.
10. the equipment of claim 9, wherein the processor（220）It is configured to：
Broadcast the quiet period duration, the quiet period duration corresponds to another parameter of the sensing rate,
Other quiet periods duration is received from other equipment, other described quiet period duration correspond to the sensing and required
Another parameter, and
If the sensing requires to exceed the sensing rate, the quiet period duration is optionally arranged to be equal to institute
State other quiet periods duration.
11. the equipment of claim 8, wherein the processor（220）It is configured to：
Broadcast the quiet period duration, the quiet period duration corresponds to the parameter of sensing rate,
Other quiet periods duration is received from other equipment, other described quiet period duration correspond to the ginseng that sensing is required
Number, and
If the sensing requires to exceed the sensing rate, the quiet period duration is optionally provided into equal to institute
State other quiet periods duration.
Applications Claiming Priority (4)
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| US60/990313 | 2007-11-27 | ||
| US60/990,313 | 2007-11-27 | ||
| CN200880117976.XA CN101878664B (en) | 2007-11-27 | 2008-11-24 | Distributed scheduling of quiet-period for in-service channel monitoring |
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| CN200880117976.XA Division CN101878664B (en) | 2007-11-27 | 2008-11-24 | Distributed scheduling of quiet-period for in-service channel monitoring |
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| CN104113846A CN104113846A (en) | 2014-10-22 |
| CN104113846B true CN104113846B (en) | 2017-09-29 |
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| CN201410269623.9A Active CN104113846B (en) | 2007-11-27 | 2008-11-24 | Method and apparatus for dispatching quiet period |
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| KR101491555B1 (en) * | 2008-10-10 | 2015-02-11 | 삼성전자주식회사 | Cognitive radio communication terminal and method for detecting collision using feature detection |
| KR101527116B1 (en) * | 2008-12-16 | 2015-06-08 | 한국전자통신연구원 | A channel sensing scheme using natural quiet period in cognitive radio systems |
| KR101630867B1 (en) * | 2009-02-27 | 2016-06-24 | 코닌클리케 필립스 엔.브이. | Scheduling and protection of quiet periods in a quiet zone for incumbent signal detection |
| US8401478B2 (en) * | 2009-04-06 | 2013-03-19 | Interdigital Patent Holdings, Inc. | Television band (TVBD) channel quieting across diverse radio access technologies |
| GB2470716B (en) | 2009-05-18 | 2013-10-23 | Cook Medical Technologies Llc | Thrombus retrieval device |
| US8688132B2 (en) * | 2009-09-07 | 2014-04-01 | Telefonaktiebolaget L M Ericsson (Publ) | Sensing wireless transmissions from a licensed user of a licensed spectral resource |
| JP2013511240A (en) * | 2009-11-16 | 2013-03-28 | インターデイジタル パテント ホールディングス インコーポレイテッド | Silent period adjustment for Dynamic Spectrum Manager (DSM) |
| JP5610338B2 (en) * | 2010-06-09 | 2014-10-22 | 独立行政法人情報通信研究機構 | Wireless device |
| CN102281541B (en) * | 2010-06-13 | 2014-04-16 | 华为技术有限公司 | Silent period synchronization method and device |
| US8804536B2 (en) * | 2010-08-16 | 2014-08-12 | Qualcomm Incorporated | Method and apparatus for facilitating sensing in cognitive radio communications |
| WO2012039504A1 (en) * | 2010-09-22 | 2012-03-29 | Nec Corporation | A wireless station, an interference estimation method, a wireless communication system and a computer program |
| US8983484B2 (en) | 2010-11-05 | 2015-03-17 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and devices for intersystem quiet period synchronization |
| EP2537975B1 (en) * | 2011-06-22 | 2020-08-05 | Electrolux Home Products Corporation N.V. | A method of controlling a rotatable-drum laundry dryer and a rotatable-drum laundry dryer implementing the method |
| US8705557B2 (en) * | 2011-07-07 | 2014-04-22 | Qualcomm Incorporated | Methods and apparatus for supporting multicast communications |
| WO2013030732A1 (en) * | 2011-08-26 | 2013-03-07 | Renesas Mobile Corporation | Apparatus and method for communication |
| US9326155B2 (en) | 2011-09-23 | 2016-04-26 | Nokia Solutions And Networks Oy | Spectrum sharing using sharing profiles |
| CN102547749B (en) * | 2012-02-20 | 2015-03-11 | 电信科学技术研究院 | Method and device for setting silence interval of cognitive radio (CR) system |
| CN103517283B (en) | 2012-06-29 | 2016-11-23 | 电信科学技术研究院 | Frequency spectrum sensing method in cognitive radio system and equipment |
| CN104219686B (en) * | 2013-05-31 | 2018-06-19 | 电信科学技术研究院 | A kind of frequency spectrum sensing method and equipment |
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Also Published As
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| EP2229794A2 (en) | 2010-09-22 |
| US20100246442A1 (en) | 2010-09-30 |
| WO2009069069A3 (en) | 2009-09-24 |
| ATE517524T1 (en) | 2011-08-15 |
| CN101878664B (en) | 2014-07-23 |
| TW200939807A (en) | 2009-09-16 |
| EP2229794B1 (en) | 2011-07-20 |
| KR20100113493A (en) | 2010-10-21 |
| JP5415441B2 (en) | 2014-02-12 |
| JP2011505090A (en) | 2011-02-17 |
| TWI488508B (en) | 2015-06-11 |
| CN104113846A (en) | 2014-10-22 |
| WO2009069069A2 (en) | 2009-06-04 |
| KR101572812B1 (en) | 2015-12-01 |
| US8576747B2 (en) | 2013-11-05 |
| CN101878664A (en) | 2010-11-03 |
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